<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        *{
            margin:0;padding:0;
        }
        html,body{
            width: 100%;
            height:100%;

        }
        img{
            position:absolute;
            left:50%;
            top:50%;
            width:618px;
            height:128px;
            margin-left:-25%;
            margin-left:-25%;
        }
        body{
            position: relative;
            background: url("images/bg.png") no-repeat center center;
            background:cover;

        }

    </style>

</head>
<body>
    <img src="images/phone.png" alt="">
</body>
</html>